fteqw/engine/sw/d_trans.c

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#include "quakedef.h"
#include "d_local.h"
#include "r_local.h"
#ifdef PEXT_TRANS
int t_numtables;
qbyte p1multitable[] = {1, 99, 49, 97, 48, 19, 47, 93, 23, 91, 9, 89, 22, 87, 43, 17, 21, 83, 41, 81, 4, 79, 39, 77, 19, 3, 37, 73, 18, 71, 7, 69, 17, 67, 33, 13, 16, 63, 31, 61, 3, 59, 29, 57, 14, 11, 27, 53, 13, 51, 1, 49, 12, 47, 23, 9, 11, 43, 21, 41, 2, 39, 19, 37, 9, 7, 17, 33, 8, 31, 3, 29, 7, 27, 13, 1, 6, 23, 11, 21, 1, 19, 9, 17, 4, 3, 7, 13, 3, 11, 1, 9, 2, 7, 3, 1, 1, 3, 1, 1, 0};
qbyte p2multitable[] = {0, 1, 1, 3, 2, 1, 3, 7, 2, 9, 1, 11, 3, 13, 7, 3, 4, 17, 9, 19, 1, 21, 11, 23, 6, 1, 13, 27, 7, 29, 3, 31, 8, 33, 17, 7, 9, 37, 19, 39, 2, 41, 21, 43, 11, 9, 23, 47, 12, 49, 1, 51, 13, 53, 27, 11, 14, 57, 29, 59, 3, 61, 31, 63, 16, 13, 33, 67, 17, 69, 7, 71, 18, 73, 37, 3, 19, 77, 39, 79, 4, 81, 41, 83, 21, 17, 43, 87, 22, 89, 9, 91, 23, 93, 47, 19, 24, 97, 49, 99, 1};
tlookup *t_lookup;
tlookupp *t_curlookupp;
int t_curtable;
int t_numtables;
int t_numtablesinv;//numtables/65546
#define palette host_basepal
#define _abs(x) ((x)*(x))
void R_CalcTransTable(int table, int level)
{
FILE * f;
int p;
int p2;
int r, g, b, j;
int i;
unsigned char *pa;
int m;
int dif, curdif;
qbyte p1multi;
qbyte p2multi;
qbyte pixdivide;
p1multi = p1multitable[level];
p2multi = p2multitable[level];
pixdivide = p1multi + p2multi;
COM_FOpenFile (va("data/ttable%i.dat", (int) level) , &f); //we can ignore the filesize return value
if (f)
{
if (fread (t_lookup[table], 256, 256, f) == 256)
{
fclose(f);
return;
}
fclose(f);
}
Con_Printf("Generating transtable %i%%\n", level);
for (p = 0; p < 256; p++)
{
j = p*3;
for (p2 = 0; p2 < 256; p2++)
{
dif = 0x7fffffff;
m=0;
i = p2*3;
r = (palette[j+0] * p1multi + palette[i+0] * p2multi) / pixdivide;
g = (palette[j+1] * p1multi + palette[i+1] * p2multi) / pixdivide;
b = (palette[j+2] * p1multi + palette[i+2] * p2multi) / pixdivide;
for (i = 0,pa=palette; i < 256-16; i++,pa+=3)
{
curdif = _abs(r - pa[0]) + _abs(g - pa[1]) + _abs(b - pa[2]);
if (curdif <= 0) //force 0
{
m = i;
break;
}
if (curdif < dif)
{
dif = curdif;
m = i;
}
}
(t_lookup[table])[p][p2] = m;
}
}
COM_CreatePath(va("%s/data/", com_gamedir));
#if 1
f = fopen (va("%s/data/ttable%i.dat", com_gamedir, (int) level), "wb");
if (f)
{
if (fwrite (t_lookup[table], 256, 256, f) != 256)
{
Con_Printf("Couldn't write data to \"data/ttable%i.dat\"\n", (int) level);
fclose(f);
return;
}
fclose(f);
}
else
Con_Printf("Couldn't write data to \"data/ttable%i.dat\"\n", (int) level);
#else
COM_WriteFile(va("data/ttable%i.dat", (int)level, t_lookup[table], 256*256);
#endif
}
void D_InitTrans(void)
{
int i;
int table;
if (t_lookup)
BZ_Free(t_lookup);
//no trans palette yet..
Con_SafePrintf("Making/loading transparency lookup tables\nPlease wait...\n");
MakeVideoPalette();
if ((i = COM_CheckParm("-ttables")) != 0)
{
t_numtables = Q_atoi(com_argv[i+1]);
if (t_numtables < 1)
t_numtables = 1;
}
else
t_numtables = 5;
t_numtablesinv = ((float)65536/t_numtables)+1;//65546/numtables
t_curtable=0;
//t_lookup = Hunk_AllocName(sizeof(tlookup)*t_numtables, "Transtables");
t_lookup = BZ_Malloc(sizeof(tlookup)*t_numtables);
t_curlookupp = t_lookup[t_curtable];
if (t_numtables == 1)
R_CalcTransTable(0, 50);
else if (t_numtables == 2)
{
R_CalcTransTable(0, 50);
R_CalcTransTable(1, 100);
}
else
{
for (table = 0; table < t_numtables; table++)
R_CalcTransTable(table, 100/((float)(t_numtables-1)/table));
}
Con_Printf("Done\n");
}
#ifndef Trans
byte _fastcall Trans(byte p, byte p2)
{
return t_curlookupp[p][p2];
}
#endif
void Set_TransLevelI(int level)
{
/*
0 =0
12.5 =1
25 =2
37.5 =3
50 =4
62.5 =5
75 =6
87.5 =7
100 =8
*/
t_curtable = level/(100.0f/(t_numtables-1));
t_curlookupp = t_lookup[t_curtable];
}
void Set_TransLevelF(float level) //MUST be between 0 and 1
{
// level+=1.0/(NUMTABLES-1);
if (level>1)
level = 1;
t_curtable = level*(t_numtables-1);
t_curlookupp = t_lookup[t_curtable];
}
#endif